GBM wrote:
Thanks Richard - After posting here, I found you site and repeated the
question there, but in more detail.

Low voltage is unlikely because batteries were freshly charged - could be a
bad connection somewhere - I will check. High/Low voltage is possible if an
input range of say 110-120v does not result in 24V within the cutin/out
range.

Fan circuit overload is possible - I added some insulation above unit -
maybe something dropped into fan - I will try vacuuming. I will also try
disconnecting the fan.

I will also try and get an ammeter installed - I don't like the idea of
adding more connections though - Maybe I can get a clamp on type.

Funny thing though, once unit does start, it keeps running, so you would not
think there could be an overload.

I will post this reply to your site too and perhaps we can move discussion
there?

GBM

My site and mail is off for a couple of hours on Sundays so I will
answer your questions here.
1. If you disconnect shore power from boat the question of high voltage
will be eliminated. The BD35 Module can except voltages up to 29 volts
before it shuts down compressor.
2. I have no information on Mobiletronics's inverter or how it is
wired to the Danfoss module. If one of the safety perimeters of module
is being violated there will be a single audible beep coming from
module. Is there a beep sound when unit is turned on and unit does no
run? Does fan run even if unit does not run?
3. Terminal P on module is only used if low voltage cutout is to be
increased so if there is a wire on P terminal remove it and tape the
lose end.
4. The only wire to be connected to Module terminal D is a ground wire
from troubleshooting LED and that ground is only activated when a
module parameter is exceeded. One flash of LED indicates low voltage,
Two flashes a fan problem and so on. Low voltage on start may not be
detectable with a meter unless you have Superman's eyes. Any
resistance connection in wiring anywhere between module and battery
will signal module to abort when current starts to flow, that why I
recommend by passing all wiring.

Correction to my first post the LED on older compressors is connected
to terminals C and D but on BD35 and BD50 compressors it is connected
to the small + terminal and the D terminal.

wrote

Thanks for the reply Richard.

1. If you disconnect shore power from boat the question of high voltage
will be eliminated. The BD35 Module can except voltages up to 29 volts
before it shuts down compressor.

Yes - If battery charger is the cause this will help. Unit should run OK on
Mobitronic unit and has in past - But I need to do some detailed testing.

2. I have no information on Mobiletronics's inverter or how it is
wired to the Danfoss module.

FYI - The Waeco Mobitronic rectifier accepts 110V and puts out 24V nominal.
When AC is present, a solenoid acitivates which switches off DC battery
power. The DC power from the battery runs to this unit and then on to the
refrig unit Here are some links - I suppose it is possible that this unit
has a fault, because even DC from battery goes through it's internal switch.

http://makeashorterlink.com/?T1782437D

http://www.waeco.biz/tmp/MPS-35_B_d_gb_04.pdf

If one of the safety perimeters of module
is being violated there will be a single audible beep coming from
module. Is there a beep sound when unit is turned on and unit does no
run? Does fan run even if unit does not run?

I have not heard a beep and fan does not run. Unit just seems to go into
hibernation, but then it eventually wakes up after temperature in box has
risen 10F or more.

I see your site is back on - I will post later after I go down to boat.

GBM